Light-emitting device having circuits and method for driving the same
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embodiment 1
[0042]A configuration example of a light-emitting device according to one embodiment of the present invention is shown in a block diagram of FIG. 1A. Although the block diagram shows elements classified according to their functions in independent blocks, it may be practically difficult to completely classify the elements according to their functions and, in some cases, one element may have a plurality of functions.
[0043]A light-emitting device 100 in FIG. 1A includes at least a panel 103 having a plurality of pixels 101 in a pixel portion 102, a controller 104, and a power supply circuit 105.
[0044]Each of the pixels 101 includes a light-emitting element and a transistor for controlling operation of the light-emitting element. The panel 103 includes, in addition to the pixel portion 102, various driver circuits for controlling operation of the pixel portion 102.
[0045]When a signal Sig1 containing image data is input to the controller 104, the controller 104 has a function of processi...
embodiment 2
[0073]In this embodiment, a structure example of the light-emitting device 100 illustrated in FIG. 1A is described in detail.
[0074]FIG. 4 is a block diagram illustrating a structure example of a light-emitting device according to one embodiment of the present invention. The light-emitting device 100 in FIG. 4 includes, as in FIG. 1A, the panel 103 having the plurality of pixels 101 in the pixel portion 102, the controller 104, and the power supply circuit 105. The light-emitting device 100 in FIG. 4 further includes an input device 120, a CPU 121, an image processing circuit 122, and an image memory 123. The panel 103 of the light-emitting device 100 in FIG. 4 includes a signal line driver circuit (a source driver) 124 and a scan line driver circuit (a gate driver) 125.
[0075]The input device 120 has a function of applying data or an instruction to the CPU 121 included in the light-emitting device 100. For example, the input device 120 can apply an instruction to transfer the pixel p...
embodiment 3
[0086]In this embodiment, an example of a specific structure of the pixel 101 included in the light-emitting device 100 illustrated in FIG. 1A is described.
[0087]FIG. 5A is an example of a circuit diagram of the pixel 101. The pixel 101 includes the transistor 108 controlling input of the signal Sig1 or the signal Sig2 to the pixel 101, the light-emitting element 106, the transistor 107 controlling the value of current supplied to the light-emitting element 106 in response to the signal Sig1 or the signal Sig2, and the capacitor 112 for holding the potential of the signal Sig1 or the signal Sig2.
[0088]Examples of the light-emitting element 106 include an element of which luminance is controlled by current or voltage. For example, in the case where OLED or the like is used as the light-emitting element 106, one of the anode and the cathode serves as a pixel electrode and the other thereof serves as a counter electrode.
[0089]The potential of the pixel electrode of the light-emitting e...
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Abstract
Description
Claims
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